1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263cce6f28e4f9646e4818c1b6821dc8d493262ff7281f46b3488b175482a3b2. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4fac618-8328-4bd5-871a-e5a5498ddb53.json and https://artists.proofprofile.net/proofs/artist/d4fac618-8328-4bd5-871a-e5a5498ddb53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1584c7b83bf7907971bd5430508f3f9f5aabeee1b245f0ea2c2df3de88591f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CACWV2350493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c46882bdde698d2c2371d85717e689bfcf847f834b6df542fac8373cd9bfd70. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2306645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e817460abac94682a705c82b3d055c574bbe7be763da4b9e75bfeb90fdf615. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc970de435b7ce6847954a631aa15f76d54c0c4d9a3b383cfac7baa8d6476fa. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2377184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506430f34b75ef56b4742a7c1397c4f7bac03425a6d8444f5153285ea308ae3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CBF8B2434203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5b94cd9fb1e81bd87fe14584e7f847ab58e5f2d047121ca181a232ef615aba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHQJ2555046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d274cacdc8c1ca0e994d419229485fe87bf3f3fa25c77f8a8a72da1a35a9cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CACWV2565407.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a52d4d200a4dd36d182149f611f3ff8caed7595acd14a18c8af4c86d6767a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0220e675f16dee9889e40923bb478f5c78b921b34d7174701f48497ecac47754. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd466706adaa5c742e9fe815e9784ba563d83934e40f33b03ae8ee0e6157b43. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d274cacdc8c1ca0e994d419229485fe87bf3f3fa25c77f8a8a72da1a35a9cc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CACWV2565407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5b94cd9fb1e81bd87fe14584e7f847ab58e5f2d047121ca181a232ef615aba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHQJ2555046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec1839b13325622a26dadf50edaf527faa79eccf7803abaee19191d6780500c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854ed7f8aba4ac69a5b488935d3f1d03c5c0bc89e0301be40be09fd0d8745b0a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4637d94c3a6c78350e1317c3860ed09202f79608699df48df65446a58845bc. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34893cccf9005dc7cdda617a0ef2e626fc96c555eda1b4bc9d8723a64825574. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52961725a07ef1a13618f8d53e2949f5fdf3de632e068eec08799abce02925b1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506430f34b75ef56b4742a7c1397c4f7bac03425a6d8444f5153285ea308ae3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CBF8B2434203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5663b4510fcd6c9e98d8657085dbd3bafc632513bb12d321344153f6a8712d64. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:32:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2952473292e4aa5254c3bb486d69342a80e120a1c1efe4e6bc15b044f83998bd. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2547072.